Wheel for motor vehicles



y' 1929- J. A. GRANSTEDT 1,711,887

WHEEL FOR MOTOR VEHICLES Filed May 9, 1928 i ate'nted May 7, 1929.

UNITED STATES I PATENT OFFICE.

'JoHAnAnsnELM eniins'rnnnor SJ'ALEVAD, SWEDEN, ASSIGNOR T comma PER.

- OLOF FOGELQV'IST, or SUNDSVALL, swnnnn.

WHEEL non Moron VEHICLES,

Application filed May 9, 1928, Serial No.

This invention relates to .an improved.

wheel for motor vehicles. v The objectof the invention is to provide a wheel which has a better power of gripping the roadway than ordinary wheels and therefore is lesssubjected to skidding or' slipping when driving in snow, on loose roads and drenchedlground etc.

The invention consists, chiefly, in giving 0 the wheel, when unloaded, ail-oblong orellip- I 5 are sections on the lines AB and CD re spectively in .Fig. 3. Fig. 6 is an elevation of another auto-car tire and felly according to the invention. I

' Referring now to. Figs. 1-2, the tractor wheel 1 is provided with an oblong or elliptical rimor tread 2 of. rigid material which 1 supports angular flanges 3 in the usual manner. Said flanges 3 are made of a rigid material and all equally high and thus their outer I edges also form an elliptic contour Fig. 1 concentric with the elliptic rim. The deviation of the rim from the usual circular form is seen I from a comparison between the'dotted circle 4 and'the outer contour lineof the rim.

In Figs. 3-5 a pneumatic tire 5 for autocars is shown, which has been given an oblong or elliptic contour by increasing the thickness of the outer rubber layerfsuccessively from two diametrically opposite points of the wheel 49 periphery to two -points at right angles thereto, as is more clearly seen from Figsul and 5, showing two sections onthe lines A-B wheels would stop because of the wheels cut- 276,406, and in Sweden March 12, 1925.

and CD respectively at right angles to each other through the lowest and the highest portions of the tire tread. The dotted line 4 indicates the usual circular contour of autocar tires.

In Fig. 6 a detachable rim 6 is shown, whose outer contour is elliptical and inner contour is circular to fit on a wheel felly of the usual circular type. On said rim a pneumatic tire 7 of the usual design is mounted which consequently assumes a corresponding elliptical Experiments have proved that this oblong or elliptic form of the tread or rim contour of the wheel is much superior to the usual wheel shape and involves complete elimination of slipping and prevents the wheel from rotating in its own groove without pushing the vehicle forward. A vehicle having wheels according to this invention can therefore be driven also on loose roads, drenched ground, in snow etc where a vehicle fitted with usual d tlng themselves down and remaining rotating in one and thesame place.

What I claim is 1. A wheel for motor vehicles having when unloaded an -oblong or elliptic contour in planes at right angles to the axle of the wheel.

2. In a wheel for motor vehicles, a rim of rigid material having elliptic shape in planes at right angles to the axle of the wheel, when the wheel is unloaded. 5 '3. In a wheel for motor vehicles, a rim of rigid material having elliptic shape in planes at right angles to the axle of the wheel, when the wheel isunloaded, and flanges of rigid material mounted thereon all of said flanges having the same height.

In testimony whereof I have slgned my 

